Furniture



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3 S. HYWARD.

FURNITURE.

No. 333,333. Patented May 24,

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S. HAYWARD. FURNITURE.

No. 333,339e m3311333 May 24, 1337.

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M Quinn lln'i STATES PATENT @Triciao SAMUELv HAYVARD, OF BOSTON, MASSACHUSETTS.

FURNITURE.

SPECIFICATION forming part of Letters Patent No. 363,389, dated May 24, 1887.

Application filed February QG, 1887.

To @ZZ whom it may concern:

Be it known that I, SAMUEL HAYWARID, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Furniture, of which the following, taken in connection with thc accompanying drawings, is a specification.

My present invention relates to devices for raising and lowering articles of furniture to adapt them to different uses or more desirable positions, and is an improvementnpon the invention described in the Letters Patent No. 356,938, granted to m'e February l, 1887, and is especially adapted to use upon easy-chairs for varying the height and inclination of the seat and adjusting the angle ofthe back.

The obj ect of my invention is to simplify the means for changing the angle of the supporting-legs of any article of adjustable furniture for the purpose of varying the height of the same, and in the case of adjustable chairs to vary the inclination of the chair-back and the spread of the legs from front to rear by the same operation that changes the height of the seat, whereby a chair having a back adjustable to different angles may be rendered more stable than those now in use without having so broad a base when the back is in its most upright position as to be objectionable; and it consists in certain novel features of construction and combination oi parts, which will be readily understood by reference to the descrip tion of the drawings, and to the claims, to be hereinafter given.

Of the drawings, Figure l represents a central vertical sectional elevation of a chair embodying my invention. Fig. 2 represents an inverted sectional plan of the same, the cutting plane being on line x .fr on Fig. 3, and Fig. 3 represents a partial -sectional elevation through one of the side frames of the chair, showing thc mechanism for operating the legs and back.

ln the drawings, A A are the side frames, connected together by the seat portion B and the rounds C C, and each of which is provided with a suitable arm, D, and two legs, E E, a portion, a, of cach of which is thinner than the remaining portieri, and freely moves about the round C, within the slot A of the side frame. The portion a of each leg extends some dis- Serial No. 22:,036. (No model.)

tance from the fulcru n1 C, and to its end is connected a link, F or F, the opposite ends of which are pivoted to the nut G, mounted and movable upon the vertical screw H, which has 5 5 secured to its upper end the pinion I, by which it is revolved in its bea-rings. 'The nut G fills the slot A', so that it cannot turn uponsaid screw H, but must be moved lengthwise thereof as said screw is revolved. The pinions I I are 6o adapted to be revolved by the large gear-wheel J, which is mounted upon the bar K, secured tothe under side of the seat-frame B, and which is provided upon its under side with bevel gear-teeth which mesh into and have motion imparted thereto by the bevel-pinion L, which is secu red to a short shaft mounted in the stand M, and to the opposite end of which is secured the hand-wheel N, by which said pinion may be turned to impart motion to the gear-wheel J. 7o

The hand-wheel N may be dispensed with and a crank used without altering the principles of my invention.

The lower ends of the side frames O of the back portion are made of such a thickness as to allow said ends to be freely moved within the slot A about the'fulcrum-pin b, by which said back is secured to the main side frames A A. The extreme lower ends of said frames O O are-connected by the links P to the upwardly-projecting arms of the rear legs, E, all as shown in Fig. 3.

The links F, which connect the rear legs with the nuts G, are considerably shorter than the links F,which connect the forward legs to said nuts, so that when said nuts are moved the length of said screws H the rear legs will be moved a greater distance about their fulcrums than will the forward legs, which will cause the seat portion to be inclined. slightly to the rear; or, in other words, the back of the seat will be lower than the front portion.

The side frames O O of the back are connected together by the wooden bars o and d, and the whole chair is provided with suitable cushions, which may be of any form, and attached in any well-known manner.

The operation of the chair is as follows: All the parts being in the positions shown in Fig. 1,(in which case the nut G will be atQthe upper end of the screw Il, and the legs and back in the nearest to a vertical or upright position they can assume, as shown in dotted lines in Fig. 3,) and the occupant of the chair desir# ing the back to be inclined to a greater'or less degree, he has only to turn the hand-wheel N, which, by means of the pinion L and gear J, will impart motion to the pinions I I and revolve the screws H H, to which said pinions are secured. The rotation of said screws will force the nuts G G, mounted thereon, downward, thereby operating the legs E, so that the lower ends will be swung outward and assume positions much farther apart, the bases or ends ,of the rear legs moving much farther to the rear than do the bases of the forward legs moveto the front. This action allows the seat to drop a short distance,with its back or rear end the lowest, as shown in Fig. 3, and while in this positiomwith its back tilted to the rear, whichis done simultaneously with the move.- ment of the legs, it is more capable of resisting, any tendency of overturning.

If desired, the pinion L and hand-wheel N may be dispensed with, and the wheel J may be turned by the operator seizing the rim or spokes of the same.

When applied to an article of furniture which it is desired to raise and lower bodily,-

and at the same time maintain the same in a level positiomor at the same angle at all points of elevation, the links F and F are to be made of the same length', ask shown and described in the Letters'Paten't hereinbefore referred to.

What I claim as new, land desire to secure 'byLetters Patent of the United States, is-

1. I-nan article of furniture, the combina tion of the main body of the article, four independently pivoted legs, vertical screws mounted in bearings in said main body, a pinion secured to each of said screws, a gearwheel engaging with each of said pinions, a non-revolving nut mounted upon each of said screw-s, and a series of links connecting the upper ends of the pivoted legs tosaidnuts.

2. A chair provided with a series'of pivoted legs and an independently-pivoted back, all connected together and arranged to be simultaneously moved about their pivots to vary the distance betweenthe feet at the same time that the inclination of the back is changed.

3. A chair provided with aseries of pivoted legs and an independentlylpivoted back, all connected together, and constructed,arranged, and adapted to be simultaneously moved about their pivots a different distance, the rear pair of legs moving about their fulcrums a greater distance than the forward legs.

4. A chair provided with hollow or slotted side frames, in combination with a screw mounted in bearings in the slotted portion of each or" said side frames, a nut movable lengthwise upon said screw, a pinion secured to said screw, a gear-wheel for imparting motion to said pinions, a series of pivoted legs, links for connecting said legs to said nuts, a pivoted back, and links for connecting `said back with the rear pair of legs. f

5. The combination ofthe hollow or. slotted side frames, a screw mounted in suitable bearings in the slotted portion of each of said. side frames, a nut movable lengthwise upon said screw, a gear-wheel forimparting motion to 'said pinions, a series ol pivoted legs, a link for connecting the forward leg to said nut, a shorter link for connecting the rear leg to said nut, a pivoted back, and links for connecting said back with the rear pair of legs.

In testimony whereof l have signed my name to this specilicatiomin the'presence oftwo subscribing witnesses, on this 24th day of February, A. D. 1887.

SAMUEL HAYWARD.v

Witnesses:

N. C. LOMBARD, WALTER E. LOMBARD. 

